A proposed mining road through interior Alaska that was shelved amid the state’s multi-billion dollar budget crisis has been authorized by the administration of Gov. Bill Walker to spend more than $3 million to start an environmental assessment.

In December, Walker issued an administrative order freezing six of the state’s biggest projects—including the Susitna Dam and the Knik Arm Bridge. Among them was the Ambler Mining Road—a proposed 200-mile industrial corridor connecting the Dalton Highway north of Fairbanks to multiple deposits of copper, zinc, and gold near the northwest communities of Ambler and Kobuk.

Walker’s order halted any new spending on the projects—but an October memo from Pat Pitney, the director of the state’s Office of Management and Budget, shakes loose $3.6 million previously set aside for the Ambler Road’s environmental impact statement, or EIS.

“The choice for an administration is, potentially, turn the tap on or turn the tap off, but they can’t move money around for other purposes,” explained Marcia Davis, Walker’s deputy chief of staff. She said the $3.6 million comes from a $12 million pot of money lawmakers set aside under former governor Sean Parnell. What remains of that money is $8.1 million, from which the $3.6 million is drawn. Pitney’s memo stated as much as $6.8 million could be required to complete the EIS, overshooting the available funds by $2.3 million.

Despite a multi-billion dollar state deficit, Davis said the money can only be spent on the Ambler Road EIS due to the past appropriation; only the legislature could divert the funds elsewhere. She said the governor released the funds now due to what she called strong support for the project.

“We got such strong advocating from the NANA Development [Corporation], from NovaCopper, and from the different boroughs, we looked at it, analyzed it, assessed it, in terms of whether it could potentially repay funds back to the state. And we decided that we would draw the line at the feasibility and scoping part of the EIS,” Davis said.

But while support from the road has been strong from mining companies, like Canadian mining concern NovaCopper, and the NANA Development Corp. says it supports the EIS process, the response at dozens of meetings with tribes and others living and working along the road’s proposed corridor have been more mixed.

One major sticking point: the cost. AIDEA’s own estimates range up to $300 million. Project contractor Dowl HKM has said that could climb as high as $400 million. Critics of the road have said it could cost millions more. AIDEA plans to pay for it through bonding and tolls, and not public money. Davis points to the road AIDEA built for the Red Dog Mine as a model for how the Ambler Road could play out.

“The cost [for the Delong Mountain Transportation System] was $267 million, roughly, and what we have received from tolls on that road so far has been $401 million,” Davis. “So we’ve already made $143 million on that and stand to make more over time.”

But the road’s ultimate route and final cost are all estimates at this point. AIDEA spokesperson Karsten Rodvik said money for the EIS preserves the work that’s already been done in the last six years, and will launch the necessary next step: a complex federal review process.

“We expect within the next few weeks to file the formal EIS permit application,” Rodvik said Friday. “At that point it goes into federal hands. And the scoping process is expected to take anywhere from 12 to 18 months.”

That process means getting hands-on with federal agencies like the National Park Service and the U.S. Fish and Wildlife Service, as well as tribes and corporations who live and own land along the proposed route.